TCM element planar circuit diagram design method
A technology of planar circuits and design methods, applied in computer-aided design, computing, electrical digital data processing, etc., and can solve problems such as low efficiency
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Embodiment 1
[0034] A method for designing a planar circuit diagram of a TCM element provided in this embodiment, such as figure 1 , including the following steps:
[0035] Step 1: Lock the design target of the application side: the voltage of the whole machine is 24V, the rated power is 60W, so the total resistance is limited to 9.6Ω. TCM appearance size is controlled at 308mm long and 220mm wide;
[0036] Step 2: According to the overall size of the TCM component 308*220, the epoxy edge banding is 5mm (not less than 4mm), and the design size of the locked base material is 298*210; according to the withstand voltage level requirements of the application end (24V DC), combined with the electrical design specification, Select the corresponding creepage distance to be 3mm (not less than 2mm), and electrical clearance to be 5mm (not less than 4mm); combine the existing TCM formula and the square resistance limit corresponding to the film thickness of 25-50Ω / □, the packaging material and proc...
Embodiment 2
[0071] In this example, if image 3 As shown, according to the design and application of the TCM component planar circuit diagram design method, two parallel TCM resistors are designed on the ceramic film in the direction of 308mm, and a series TCM resistor is formed in the direction of 220mm. The overall design power is 60W, and the overall target design TCM resistor It is 9.6 ohms. According to the parallel design of two TCM resistors, it can be deduced that a single conductive TCM should be 9.6*2=19.2 ohms. The designed single TCM resistor has a length of 131.5mm and a width of 178mm, so the square resistance R S =19.2*178 / 131.5=25.99.
[0072] 9 point temperature difference assessment
[0073] Adopt "YY / T 0061-2007 Specific Electromagnetic Wave Therapy Apparatus" Figure II The test points on the surface of the middle square heater (9-point distribution standard position) can be checked by applying the 220*308 area distribution. Except for the middle point on the silver ...
Embodiment 3
[0080] In this example, if Figure 4 As shown, according to the design method of the TCM component planar circuit diagram design method, three TCM resistors are connected in series in the direction of 308mm, and four TCM resistors are connected in series in the direction of 220mm;
[0081] The overall design power is 60W, and the deduced overall target design TCM resistance is 9.6 ohms. According to the deduction of the circuit diagram, the resistance value R1 of a single conductive TCM should be 9.6 / 3*4=12.8 ohms;
[0082] The designed single TCM resistor has a length of 43.25mm and a width of 82mm, so the square resistance R S =12.8*82 / 43.25=24.27.
[0083] 9 point temperature difference assessment
[0084] Adopt "YY / T 0061-2007 Specific Electromagnetic Wave Therapy Apparatus" Figure II The test points on the surface of the middle square heater (9 point distribution standard position) can be checked by applying the 220*308 area distribution. When encapsulating, paste a ...
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